Usage:
 mcookie [options]

Generate magic cookies for xauth.

Options:
 -f, --file <file>     use file as a cookie seed
 -m, --max-size <num>  limit how much is read from seed files
 -v, --verbose         explain what is being done

 -h, --help            display this help
 -V, --version         display version

Arguments:
 Values for <num> may be followed by a suffix: KiB, MiB,
 GiB, TiB, PiB, EiB, ZiB, or YiB (where the "iB" is optional).

For more details see mcookie(1).